Brass-melting furnace.



vA. G. JACKSON. BRASS MBLTING FURNAGE. I APPLICATION FILED HAY 3l, 1908. 907,603, Patented Dec. 22, 1908.

' Laien-60%@ v"other metals as to utilize the -uhder forced draft.

Rrnne c. JACKSON, or PHILADELrnrA,

or PHILADELPHIA, PENNSYLVANIA,

PENNSYLVANIA, ASSIGNOR TO MILLER LOCK CO.,

A CORPORATION BRASS-MELING FFNNACE.

Specification of Lettere Patent.

Pater. 'ed Dec. 22, 1908.

Application filed May 31, 1906. Serial. No. 319,627.

yTo elwwm it 'may concern:

Be it known that I, ARTHUR C. JAcxsoN, a citizen of the United States, residing in Philadelphia, Pennsylyania, have invented certain Improvements in Brass-Melting .Furnaces, of which thefollowing is a specification.

The object of my invention is to so construct a crucible furnace for melting brass or Waste heat Whichis inseparable from the operation of an ordinary brass melting furnace when This obj-eetl attain in the folloun mani'ier, reference being had to the accompanying drawings, in Which:-

Figure l, is a longitudinal verticali sectional "View of a brass melting furnace constructed in accordance With my invention, using coal as a fuel; and Fig'. 2, is a sectional View of a brass melting furnace in which gas or oil is used the fuel.

Referring to Fig. 1, the primary melting furnace 1 is, as regards its general construction7 simiiar to those now employed, said furnace having a grate the fuel, an ash pit 3 with a supply pipe 4 for air under pressure, an outlet flue 5 for the 'products of combustion, and a cap 5 for clos-J ing the o ening in the top of the furnace. The cruci le, as shown in Fig. 1 in which the 2 for the support of metal is to be melted, is embedded in the fuel as usual.

in carrying out my invention l'mount a secondary furnace 7 alongside of and at a higher elevation than the furnace 1 and i provide said main furnace with a side flue 9 which communicates witha similar flue 10 at'the bottom of the `second furnace,A the latter also having an outlet 'Hue 11 and a cap 12 of any suitable construction.

Both the fines 5 and 11 communicate with the stack 14 and each flue should he provided-with a damper as shown. "iffhen the damper inthe iiueis closed the products of combustion are compeiled to pass through the fines .Q endl@ and into the combustion chamber 13 of the secondary furnace 7 from l which they escape through the outlet flue 11,

thereby heating the contents of the second ary Crucible which is suitably mounted in the combustion chamber 13.

A pipe 15 having a valve 113 serves as a communication between. the ash pit and y the combustion chamber 13 and When the furnace is in operation the pipe furnishes a constant supply of air to saidcoinbustion chamber in order to ignite any of the gases enterin Y said chamber which require an additiona supply of oxygen in, order to effect their proper combustion. The amount of air admitted from the ash pit Binay be regulated hy the Valve 16, so that the suppiy of air to the secondary combustion chamber 13 is preserved at all times` in the proper relation to the main su ply in the ash pit.

When it is desired) to permit the rcducts of combustion to escape directly ffom the main fin-nace, as for instance in starting the fire, or at other times, the damper in the flue 5 can be opened and that in the flue 1i closed, therebypermitting the products of combustion to pass directly through the flue 5 to the stack.

` in Fig. 2, I have showna furnace in which gas or oil is used'in place of coal. l'n this instance the gprimary furnace 1a is connected to the secondary furnace 7a in a manner similar to that shown in Fig. 1; but a burner 17 is used connecting With the air pipe 19 and the gas or oii pipe 18; the crucible 1n the primary furnace is mounted one block, as is aise vthe crucible in the secondary furnace '7a. f may introduce gas or oil in the second: ary furnace 7'a through a burner 21 which may be made similar tc the burner 17, if an entre supply of fuel is required. The pri* mary furnace 1El a flue 5 and the secondary furnace 'Za has a-fiue 11 and the connect-- ing ues 9 end. 11 are similar to those iilustrated in Fig. 1.

After the furnace is .in operation a crucible is placed in the secondary furnace and the metal. allowed to melt in this crucible, fresh metal being added to it as the other melts. As soon as the crucible in primary furnace is removed for the purpose of pouring, the Crucible in seco dairy furnerfe is transferred to the nie ace, Where it is brought to the proper pouring temperature. is soon t 1^ iirst cricibie he been emptied and White e stili. het it is 'ed in the secondary furnace and th other metal placed in it and t ie iilled as 'the melts unti charged With the, molten mass the cruci'oie is transferred as above noted. The same operation taires piece 'when gas or oi used.

l claimt le refully 1. The combination in 'a crucihle furnace of metal, when 4 tendin'g'directly from the upper portion of the prlmary melting chamber to the lower portlon of the secondary chamber, and a stack communicating directly with both chamberss 2, `The combination in a crucible furnace in which the products of combustion always travel inthe same direction, having a primary chamber, a secondary chamber located at one side of and at a higher level than the primaryl chamber, said furnace having a diprlmafy C ve connecting the upper end of the amber with the lower end of' the secondary chamber, an ash pit under the primarychamber, an air'suppl' pipe communicatm with the ash it, an a pipe leading from t e ash pit-to t e lower portion ef the secondary chamber, a stack, iiues ecnnecting each chamber with the stack, and a valve in each flue. V l

In testimony whereof, I have name to this speciiication,' two subscribing witnesses.

ARTHUR e. JAcKsoR.

,rect passa signed Imy m the presence-me Witnesses:

WILL. A. BARR, Jos. H. KLEIN. 

